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# The "S" in Math

Across
Half a circle
A replica of an original object that is too large or too small to be built at actual size
Some portion of a larger group selected to represent that group
Solids that have the same shape but not necessarily the same size
The two rays that form an angle. In the figure, and are sides of RST.
A collection of objects or numbers, often shown using braces { } and usually named by a capital letter.
A concise way of writing a solution set.
A fraction is in simplest form when the greatest common factor of the numerator and the denominator is 1.
A drawing that is similar to an actual object, but is either enlarged or reduced
The set of all points in space that are a given distance from a given point, called the center.
A three-dimensional figure formed by intersecting planes.
A triangle with no congruent sides.
Figures that have the same shape but not necessarily the same size. This symbol ~, means similar to.
A boundless three-dimensional set of all points.
The list of all possible outcomes for an event
A set of numbers in a specific order.
A digit written to the left of the vertical line in a stem-and-leaf plot.
Down
A scale written as a ratio in simplest form
The sum of the terms in a sequence.
The segments that form a closed figure.
A system of writing numbers using multiplication and powers of ten.
All of the digits of a measurement that are known to be accurate plus one estimated digit.
Congruent arcs whose endpoints lie on the diameter of the circle.
A ratio or rate between the actual size of an object and the size of its model
Time in minute